Rotary perfecting printing presses



April 23, 1957 P. DIETRICH 2,789,499

ROTARY PERFECTING PRINTING PRESSES Filed April 8. 1955 United StatesPatent C ROTARY PERFECTING PRNTENG PRESSES Paul Dietrich, Augsburg,Germany, assigner to Maschinenfabrik Augsburg-Blumberg A. G., Augsburg,Germany, a corporation of Germany Application April 8, 1955, Serial No.599,253

Claims priority, :application Germany May 22, 1954 3 Claims. (Cl.10i-229) This invention relates to a first impression andcounterimpression sheet rotation printing press.

Heretofore, first and counterimpression rotary printing presses were fedfrom paper rolls. The objects of the instant invention are to constructsuch a press so that it can be fed individual blank sheets, and toconstruct such a machine in which the plate cylinders are readilyaccessible, and which is of simple construction and requires littlefioor space.

In general, these objects are achieved by arranging the center planes ofthe two inking mechanisms, respectively, at substantially a right angleto one another, with the inking mechanism for the counterimpressioncylinders mounted parallel to and directly above a horizontal deliveryconveyor, which is in turn mounted above the table for receiving thepile of printed sheets. As a consequence, the inking mechanism for thefirst impression cylinders is mounted substantially vertically and facesthe magazine holding the pile of blank sheets. This arrangement of theinking mechanism produces the advantage that, in spite of the smalllength of the printing press, the mechanical parts of the press areeasily and readily accessible. At the delivery end of the press thechain conveyor contains only two grabbers or rods directly beneath theinking mechanism for the counterimpression cylinders and provides spacetherebelow for a large pile delivery table. The arrangement of theinking mechanism further permits the inclusion of wiping cylindersunderneath the printing cylinder of the counterimpression cylinderswithout impairing the accessibility of the first impression cylinders.

The invention is described more fully with reference to the accompanyingdrawing which diagrammatically shows the arrangement of the cylinders inone embodiment of the invention.

The magazine 1 contains a pile of individual blank sheets 2. The sheetsare delivered from the magazine to a feed-board 3 and to a turningmechanism not shown into a printing press 4. The inking elements forboth the first impression and counterimpression cylinders are arrangedin planes which are substantially at a right angle to one another withinpress 4. The first impression member is composed of the inking rolls 5,the plate cylinder 6, and the printing cylinder 7, these elementsgenerally extending in a vertical plane. The counterimpression member iscomposed of the inking rolls 8, plate cylinder 9, and printing cylinder10, substantially horizontally arranged. The plane through the axes ofcylinders 6 and 7 is inclined and forms an acute V with 2,789,499?atented Apr. 23, 1957 ICC the plane through the axes of cylinders 9 and10, and the axis of each printing cylinder 7 and 10 is offset in avertical direction from the axis of the other printing cylinder by adistance substantially one half of the diameter of the printingcylinders.

The blank sheet il follows the path indicated by the dotted lines, andafter having passed through the two printing members, and after havingbeen printed on both sides', it is delivered to the conveyor 12 which ismounted directly beneath the counterimpression inking rolls 8. Theprinted sheet is then carried on to the delivery table 13. The positionof the inking rolls 8 results in that ronly a simple chain conveyormechanism with only two grabbers is needed. The printed sheets arecollected beneath the printing press 4.

T he printing press is driven by a motor 14. The brake suction air forthe delivery mechanism is obtained from a pump 15 driven by a separateelectric motor.

A wiping or cleaning member 16 is mounted beneath printing cylinder i0in a manner which does not interfere with the accessibility to acylinder, this wiping member serving to remove residual ink transferredto cylinder 10 by the sheet il coming from the cylinder 6.

A vacuum roll or cylinder 17 is associated in a conventional manner withthe chain co-nveyor 12, and is connected to pump 15. The air for thefeed magazine 1 is obtained from a separate pump 18.

Having now described the means by which the objects of the invention areobtained, I claim:

l. A onecolor first and counterimpression printing press comprisingfirst inking rolls, first plate cylinder, and first printing cylinderall extending in that order in a generally vertical direction; acounterprinting cylinder cooperating with said irst printing cylinder, acounterimpression plate cylinder, and inking rolls extending laterallyfrom said counterplate cylinder; the plane through the axes of saidfirst plate and said first printing cylinders being inclined and formingan acute V with the plane through the axes of the counterimpression andprinting cylinders; the axis of each printing cylinder being verticallyoffset from the axis of its cooperating printing cylindcr by a distancesubstantially one half the diameter of the printing cylinders; saidfirst inking rolls and said counterinking rolls being arranged in planeswhich are substantially at a right angle to one another; and ahorizontal delivery conveyor positioned beneath said counterinkingrolls.

2. A printing press as in claim 1, further comprising a blank sheetmagazine positioned adjacent to and spaced from said first plate andprinting cylinders.

3. A printing press as in claim 2, further comprising a wiping membermounted beneath said counterprinting cylinder.

References Cited in the file of this patent UNITED STATES PATENTS1,916,454 Wohlrobe July 4, 1933 2,360,340 Harris Oct. 17, 1944 FOREIGNPATENTS 226,816 Great Britain May 7, 1925 289,392 Switzerland July l,1953 511,813 Germany Nov. 3, 1930

